Riddling device



April 28, 1953 LE ROY s. wlLsoN RIDDLING DEVICE 4 Sheets-Sheet 1 Filed Jan. 30, 1947 l N) ENTOR BY erqy, M/z'soz. M, l

April 28, 1953 LE ROY s. wlLsoN 2,536,605

RIDDLING DEVICE Filed Jan. so, 1947 4 sheets-sheet 2 as INVENTOR.

Leray S. Vs/z'son.

April 28, 1953 LE Roy s. wlLsoN 2,636,605

RIDDLING DEVICE Filed Jan. 30, 1947 4 Sheets-Sheet 3 INVENTOR. L er@ S. M/Z'son. BY

Mazm.

HTTORNEVS April 28, 1953 LE Roy s. wlLsoN RIDDLING DEVICE 4 Sheets-Sheet 4 Filed Jan. 30, 1947 n.. WW law# z M r 1 @7 LM v.. .l B

4 u E .o M l- 4 w M Il f j 4; x a a WL 4 u u l w z l a 4. l j w# \\I apa w, n rv u 7% Y w /II xl n Patented Apr. 28, 1953 AUNITED STATES PATENT OFFICE RIDDLING DEVICE Le Roy S. Wilson, Port Huron, Mich., assignor to Roller Riddle Corp., Port Huron, Mich., a corporation of Michigan Application January 30, 1947, Serial No. 725,346

1 Claim.

This invention relates to riddling devices and more particularly to an improved power driven riddling device.

It is an object of the invention to provide an improved riddling device which is simple in construction, economical of manufacture and assembly, and reliable and eiicient in operation.

It is also an object of the invention to provide a riddling device having an improved construction affording a materially increased output of the device. A

A further object of the invention is to provide a riddling device having improved riddle supporting means effective to prevent accumulation of the sand or other material being sifted on the peripheral portions of the riddle.

Another object of the invention is to provide, in a riddling device having a reciprocating riddle, an improved riddle supporting means operable during reciprocation of the riddle to cause the sand or other material being sifted to move toward the center of the riddle.

Other and more detailed objects will be apparent from a consideration of the following description, the accompanying drawings, and the appended claim.

For a better understanding of the invention, reference may be had to the drawings, throughout the several views of which like reference characters designate like parts and wherein:

Figure 1 is a broken elevational view of a riddling device constructed accordingto my in- -vention;

Figure 2 is a plan view of the structure illustrated in Figure 1;

Figure 3 is a broken elevational view of aportion of the structure illustrated in Figure 2 taken from the line 3-3 thereof;

Figure 4 is a sectional view of the structure illustrated in Figure 3 taken substantially along the line 4 4 thereof;

Figure 5 is a sectional View of the structure illustrated in Figure l taken along the line 5-5 thereof;

Figure 6 is a sectional view of the structure 4illustrated in Figure 2 taken substantially along structure illustrated in Figure 8 taken substantially along the line ll-I l thereof.

Referring to Figures 1 4 and l0 of the drawings, the riddling device comprises a pedestal 20 having a lower casting or base 22 which supports an upright tubular column 24 which telescopically receives the lower end of a cooperating upper column 26, the upper end of which carries an upper pedestal casting 2B. The upper end of the lower column 24 is longitudinally slotted and a clamping band 3l) is provided which encircles the slotted end of the tubular column for releasably gripping and holding the upper column 2t at any desired elevation. The upper pedestal casting 28 has a centrally disposed downwardly extending tubular boss adapted to iit over the upper end of the column 26 and is secured thereto by set screws 32.`

The upper pedestal casting 28 is also provided with opposed arms 34 extending horizontally outwardly from its central supporting boss and each carrying a horizontally disposed transversely extending pin 36 adjacent to its outer end. The pins 36 are disposed in parallel relation, extend outwardly of the opposite sides of the arms 34, and are secured in place therein and held against rotation by set screws 3B mounted in the arms 34 and engaging cooperating flats 40 provided on the pins 36. The upper casting 28 is provided with pairs of spaced ribs 42 for strengthening and 'supporting each of the arms 34.

An elongated channel or carriage 44, of generally C-shaped cross section, is mounted on the upwardly extending ends of the pins 36 by means of conventional caged ball bearings 46 (see Figure 10). The C-shaped carriage 44 is disposed with the open side thereof presenting downwardly, and the edges 48 thereof are turned inwardly iso that the carriage 44 may engage the ball bearing cage at reither the top or the bottom as required by the disposition and loading of the carriage. It will bev appreciated that this construction permits movement of the carriage 44 along its own longitudinal axis but prohibits any other movement thereof, such, for example, as tilting thereof upon loading of its outer end.

Fixed to the carriage 44 are a motor 50, secured thereto by means of a bracket 52, a transmission 54 which is operatively coupled to the motor 50, and a lower riddle supporting frame 5E which is horizontally disposed and bolted or otherwise secured to the under surface of a horizontally disposed outwardly extending ange 58 integrally formed on one end of the carriage 44.

The motor is illustrated as being a conventional electric motor although itwill be appreciated that it may be a pneumatic motor or of any other suitable type. The motor is connected to the transmission 54 through a conventional flexible coupling 6|! and, through the transmission 54, reciprocates an upper riddle supporting frame 62 which is supported on the lower frame 56 in a manner hereinafter described. The riddle supporting frames 56 and 62 are fabricated of angle iron and are disposed so that in the lower frame 56 the vertical ange of the angle iron extends downwardly from the horizontal iange thereof and in the upper frame 62 the vvertical flange extends upwardly from the horizontal flange.

The upper frame 62 is supported on the lower frame 56 by means of a plurality of iexible links 64 and 66 which are generally vertically disposed. The links 64 are substantially longer than the links 66 and are connected externally to the frames 62 and 56 at opposite sides thereof and adjacent the ends thereof which are connected respectively to the carriage 425 and the reciprocating or driving means, or, as viewed in Figure l, adjacent to the left hand end of the frames 56 and 62. nected to the frames 56 and 62 at opposite sides thereof and adjacent to the opposite or, as viewed in Figure l, the right hand ends thereof. The links 613 and 66 are preferably formed of rubber and are proportioned to support the frame 62 in spaced relation above the frame 56. The opposite ends of the links 64 and 66 are connected to the frames 56 and 62 by means of brackets EB which are riveted to the vertical anges of the frames and which are provided with an appropriately presenting recess adapted to receive the ends of the links 61| or 66. Each end of each link 6d and 68 is securely held in its associated bracket 66 by means of a rivet '16, as is most clearly illustrated in Figure 5. The links 6ft and 66 are formed of flat strips which are disposed as illustrated to permit oscillation of the upper frame 62 relative to the lower frame in the direction of the longitudinal axis of the carriage 4t but to minimize vibration of the frame $2 transversely thereof. The brackets 68 mounted on the lower frame are disposed in offset relation as may be seen in Figure 1, to connect the lower ends of the longer links 64 to the frame 56 at points below those at which the shorter links 6B are connected. Also., in the illustrated construction, the horizontal spacing of the brackets 6r mounted on the frame 5S is slightly greater than that of the brackets mounted on the frame 62.

The above described construction may be varied by swinging the movable frame 62 below the frame t6 by similar link connecting means, rather than supporting it above frame 56 as described.

Referring to Figures l, 2 and 5, the upper frame 62 carries a `sieve or riddle comprising a rectangular frame i6 one end of which is covered by a corrugated screen i8, having its peripheral portions folded upwardly along the sidesr of the frame i6. A short rectangular base Sil telescopically receives the screened end of the rectangular frame 'i6 and is xed thereto by the rivets 32. 'Ihis construction clamps the peripheral portions of the screen i3 between the frame it and the base 80 and, by permitting the base 85, te extend beyond the end of the frame it, reduces the likelihood of `damage to, the screen. The riddle is so disposed that the corrugationsz of thescreen i8 extend transversely of the .lneof The shorter links 66 are similarly conmovement of the frame 62 during reciprocation thereof.

Referring to Figures 6 9 inclusive, the abovementioned transmission Eil, through which the motor 5@ reciprocates the upper riddle supporting frame 62, includes a casing and a cover plate 92 secured thereon by a plurality of bolts 94. vAn input sha-ft 96 is journaled in the casing 9c and operatively connected to the iiexible coupling 60 through which it is driven by the motor 50. Within the casing $0, the input shaft 96 carries a bevel gear 98 secured thereto by means of a key `||||i and a set screw |02. A crankshaft .ltd is journaled in the casing 90 and the cover plate 92 and is disposed at right angles to the input shaft 96. The crankshaft |04 is driven through the engagement of the bevel gear 98 with a cooperating bevel gear |06 carried on the crankshaft |04 and connected thereto by a key Hi8. The crankshaft ltd has an eccentric portion or crank il@ which is journaled in one end of a connecting rod i2. The other end of the connecting rod ||2 is bifurcated and is connected by means of a pin I4 to the lower end of an inner rocker arm H6. The upper end of the rocker arm H6 is keyed to a transmission output vshaft im, as at |26, and is secured lagainst relative movement axially thereof by a set screw |22. The output shaft H8 is journaled in the casing ee and the cover plate 94 and one end thereof extends outwardly of the casing 96 and carries an outer rocker arm |24 keyed thereto as at Referring to Figures 8 and 11. .the outer rocker arm |26! is connected, by means of a bolt y|28 extending through a conventional rubber torque bushing |39 mounted in the rocker arm. to corresponding ends of a pair of links |32. In aocordance with a conventional construction of such bushings, the inner sleeve vthereof extends outwardly of the rocker arm in which the bushing is employed and to which the outer sleeve is secured. The inner sleeve is clamped to the bolt 23 for rotation therewith bytightening a nut |34 on the bolt and clamping thelinks |32 against the ends of the inner sleeve. As best. illustrated in Figure 2, the other ends of the links |132 yare connected to the upper riddle supporting frame 62 by means of a bracket |36 riveted Vto the frame 62 and carrying a torque bushing 33 similar to the bushing i3d. The links |32 are connected rto the bracket |36 and clamped to the inner .sleeve of the bushing 33 in the manner above described by means of a bolt |40 and a nut |42.

From a consideration of the above described construction of the transmission 54, 'rt will be appreciated that rotation of the input shaft 9'6 will produce an oscillation of the output shaft H8 and reciprocation ofthe links |32' and conezquently of the upper riddle supporting frame 'The electric` motor 5t is connected by suitable wiring (not shown) to an automatic switch |i5|l mounted on a stop plate |52 bolted to and depending from the end of the carriage 44 remote from the riddle supporting frames, as illustrated in Figures 3 and 4. The switch is responsive to movement of the carriage 44 to and from the operating position illustrated in Figures 1 and 2 to automatically turn the motor 50 on and olf respectively. Movement of theA carriage 'dto the right, as viewed in Figure 1, is limited by the engagement of the stopplate |52 and a rubber bumper |54 mounted in the. adiacent end of the upper pedestal casting 28,.

To facilitate moving of the carriage between the on and on", or operating and retracting positions, a handle 156 is riveted or otherwise suitably secured to the outer end of the lower riddle supporting frame 59, as illustrated in Figures 1 and 2.

While only one specific embodiment of the invention has been illustrated and described in detail, it will be readily apparent to those skilled in the art that numerous modifications and changes may be made without departing from the spirit of the invention and the scope of the appended claim.

What is claimed is:

A riddling device comprising a base adapted to be anchored to a floor or other suitable foundation, an elongated horizontally disposed carriage, means including rolling antifriction bearings supporting said carriage on said base for free movement relative thereto along the longitudinal axis of the carriage, riddle supporting frame means secured to said carriage, a second riddle supporting frame disposed in spaced and substantially parallel relation to said frame means, resilient links supporting said second frame on said frame means, a motor mounted on said carriage, and means operatively connecting said motor to said second frame for reciprocating said frame, said links including a pair of generally vertically dis posed rubber strips disposed at opposite sides oi the longitudinal axis of said carriage and connected to said second frame adjacent one end thereof and a second pair of rubber strips also disposed generally vertically and at opposite sides of the axis of said carriage and substantially longer than said first named rubber strips and connected to said second frame adjacent the other end thereof, said longer strips being connected to said frame means substantially lower than the connection of said first named strips thereto, and all of said strips being connected to said second frame at substantially the same elevation.

LE ROY S. WILSON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 183,715 Slagle et al Oct. 24, 1876 787,190 Krause Apr. 11, 1905 1,230,477 Green June 19, 1917 1,485,946 Battenfeld Mar. 4, 1924 1,523,148 Wang-clin Jan. 13, 1925 1,582,474 King Apr. 27, 1926 1,848,141 Paterson et al. Mar. 8, 1932 1,962,734 Dupre June 12, 1934 2,074,733 Porter Mar; 23, 1937 FOREIGN PATENTS Number Country Date 52,795 Austria Mar. 26, 1912 606,836 France June 21, 1926 

